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🛒 CardCash Micro-Frontend E-Commerce Platform

Scaling to 300+ Brands with Independent Deployments

Live Brand Examples

Business Impact

Architecture Diagrams

1. High-Level System Design

Key Decisions

  • Webpack Module Federation for runtime integration
  • BFF pattern to avoid direct microservices coupling
  • Semver contracts for design system compatibility

2. Dependency Management

Innovations

Challenges & Solutions

1. Performance at Scale

Problem: Checkout MF TTI increased 300ms per added brand

Solution:

  • Implemented brand-specific code splitting
  • Prefetching strategy based on user geo/IP

Result: Maintained <1.2s TTI across all 300 brands

2. Cross-Team Coordination

Problem: Design system breaks in 30% of deployments

Solution:

  • Created "Golden Path" starter templates
  • Automated upgrade assistant (reduced upgrade time from 2 weeks → 2 days)

3. Testing Strategy

Problem: Flaky E2E tests with 40% failure rate

Solution:

  • Isolated test environments per MF
  • Playwright Component Testing for shared modules

Result: 95% test reliability

Technical Leadership Impact

1. Standards & Documentation

  • Authored Micro-Frontend Playbook (adopted company-wide)
  • Led monthly architecture office hours

2. Mentorship

  • Trained 4 engineers to MF tech lead level
  • Onboarded Uber partnership team in 3 weeks

3. Business Alignment

  • Partnered with PMs to define SLAs per brand tier
  • Reduced AWS bills by 18% through bundle analysis
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